Convert a complex nested hash to an object

Sometimes in Ruby we need to convert a Hash into an object. Instead of accessing keys in Hash, we want to access attributes (methods) on an object. OpenStruct provides an easy way for us to do this: OpenStruct.new(hash).

But what do we do if we have a complex nested Hash with Arrays etc. OpenStruct doesn't recurse over Arrays and only works well with a flat structure. I've come across a number of Gems that attempt to solve this problem, and I've been using one in particular for the past year: recursive-open-struct. While it worked well in my particular scenario, others have expressed problems. Since I was refactoring the code that made use of this Gem, I thought I take a look at trying to remove the dependency.

I discovered a simpler way to achieve the same thing without the dependency on a Gem, and with a lot less code, and I thought I might share it with the community because I think it's pretty nifty.

We can get JSON to do the heavy lifting for us and instruct it to coerce nested attributes into OpenStructs. It will also remain respectful of Arrays.

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